Pneumatic musical instrument.



J. ANDERSON, OF CHICAGO, ILLINOIS.

V FNEUMAIIC MUSICAL ENSTEUMENT.

Specification oi Letters Patent.

Patented Nov. 10, 1914.

application filed October 28, 1911. Eerial No. 657,296,

0 all whom it: may concern Be it known that l, HARRY J. ANDERSON, a citizen of the United States, residing at Chicago, in the county of clock and State of Illinois, have invented certain new and useful Improvements in Pneumatic Musical Instruments, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming apartoftliis specification. v

My invention relates to the art of pneuinusical instruments.

(has of the objects of my invention is to provide a structure whereby the primary and secondary valve pouches, as well as the action pneumatics, may be served from a single windway.

A second object of my invention is to support the primary and secondary valves, as

"well as the action oneumatics, from a sincheapen the cost oi 'manuffacture and assembling of pneumatic musical instruments.

A--further object of my invention resides in the particular arrangement and combina tion parts hereinafter described.

Referring to the accompanying drawing, Figure 1 is a sectional view illustrating my invention taken through the member to which the action pneumatics are attached.

'Figfl is a detail showing my improved valve seat. Fig. .3 is a detail showing my improved valve.

Throughout the several views, the same is designated by the same reference numeral.

Referring more particularly to the drawlugs, 1 is a solid block of trapezoidal cross section to which the action pneumatic 2 is directly attached, as shown. Leading from the pneumatic 2 is a. passage 3, which con nccts with the secondary valve chest 4. v itl n chest 4 is a valve 5 having a seat 6, which is preferably of metal. Below the seat 6 is the usual secondary pouch 7, having a membrane 8 attached across its lower end for the purpose of operating the valve 5. Passage 9 leads from beneath the membrane 8 to a passage 10, which is gov erned by the primary valve 11. The 1;

mary valve 11 has a seat 12, preferably metal, which is shown as modcsimilar to the seat 6 for the secondary valve. Below the primary chest or pouch chamber l3," is a membrane 14: below which there is an opening 15 leading to the tracker-hoard. In the upper part of block 1 is a suction windway 1.6, which is connected to the pouch chamber 7 by a passage 17 and to the pouch chamber 13 by passage 18. Passages 17 and llfi' aa're shown in dotted lines, and it will be 'd 'hderstood that they are close to the passage 9 but,

not in exactly the same section, as 9. ltii'ill he understood further that the membrane'll is provided with the usual bleed hole. A board 19 is used to cover the windway 16 and also the valve chest i, a port 20 being provided for the admiss on of atmospheric air to the said chest. It will be seen from this that the construction liloc described is remarkably simple, and at the same time cheap to manufacture;

I find that there is no necessity for plugging any holes whatever, all the various passages being so placed that they can be bored from the. exterior of the piece 1 without leaving any unused portions which require plugging. It will be soon also that the holes from the central windway to the two pouch chambers, as well as the hole between the two pouch chambers, are straight, thus can abling me to bore each oi" such holes at one operation, and allowing each pair of holes 17 and 18 to be bored at a single setting of the work.

Referring more particularly to Figs. 2 and 3, the seat 6 is shown as having the annular grooves 21 and 22 leaving thin edges between them. The groove 22 also is provided with a bleed hole 23, connecting with thcvalvc pouch cl'iamber. Thus when the valve 5 is in a lower position, its lower face is subject to the. suction of the pouch'not only over the surface of the port but also over the surlacc which faces the groove 22.

Now, the faces of the valve 5 are provided with soft layers 24 of leather or other soft material, which are clamped to a hard central core 25 by a cylindrical metal piece 26, which has its edges crimped over so as to bind against the outer face of the layers 24 so avoiding the use of adhesive. Thus the soft layer 2 1- on the lower face of the valve is subjected to apull due to the force of vacuum in the valve pouch 7 on both sides of the inner edge of the valve seat. It will be obvious that the leather will thus be stretched taut over this edge, giving a very tight fit. A similar action is obtained at the outer edge of the groove 22, although the pull in this case is on one side of the edge only, The leather, however, is pufi'ed out as shown. in Fig. 2, so as to it tightly against both edges of the groove 22, preventing all leakage of air past the valve.

Referring to the seat of the primary valve, as shown in Fig. l, I provide a metal seat 12 which is extended down into the passage 10.

in the side of the cylindrical portion of this metal piece I provide a bleed hole at 27 which opens into a socket in piece 1, the socket connecting with the groove in the upper face of the valve seat by means of a second bleed hole 28.

it will be apparent to those skilled in the art that various changes and modifications may be made in my construction above described without departing from the spirit of mv invention but I contemplate all such changes and modifications as are embraced within the scope of the appended claims.-

Having thus described my invention,what I claim is,

l. in an automatic musical instrument in combination, a valve having aflexible sur face layer, a part of which is unattached to the valve, and a valve seat co'ciperating with said valve provided with a groove, the unattached portion of said layer being nor mally in contact with the edges of said groove.

2. In an automatic musical instrument in combination, a valve having a flexible surface layer, a valve seat cooperating with said valve provided with a central port, a groove surrounding said port, and a bleed hole normally connecting said groove with said central port.

3. in an automatic musical instrument, a suction chest, a valve seat mounted in said chest, said seat having a plurality of grooves therein and having narrow ridges between grooves, said seat also having an aperture for connecting the inner one of said grooves with the suction.

4-. in an automatic musical instrument in combination, a valve seat provided with a main central port connected with a source of air tension, and having a groove surroun said port and sharp ridges on each side sea. roove, said seat also havingan aperture normally connecting said groove with said source of air tension, and a valve having a flexible cover cotiperating with said seat, said flexible cover being normally in contact with said ridges.

5. In an automatic musical instrument in combination, a seat having a groove therein and provided with sharp ridges upon each side of said groove, said seat also having an aperture in communication with said groove for admitting air tension therein, and a valve for cotiperating with said seat having an inelastic core and a flexible layer covering the faceof said core next said seat, said layer being attached to said core along its outer edge only and being normally in contact with said ridges.

6. An automatic musical instrument in combination, a valve seat having two grooves therein and having sharp ridges on each side of and between said grooves, said seat being provided with an aperture connecting with the inner of said grooves for placing said groove in connection with a source of air tension, and a valve for-coiiperating with said seat comprising an inelastic core, flexible layers on the opposite faces of said valve and a metal case for clamping said layers to said core.

7. In an automatic musical instrument in combination, a valve seat having a groove therein and provided with ridges on both sides of said groove, and a valve for cooperating with said seat. said valve having an inelastic core, and a flexible layer on one face of said core for coiiperating with said seat, said layer being attached to'said core along its outer edge only.

8. In an automatic musical instrument in combination, a suction chest having a suction windway and a pouch chamber therein, said windway being connected to said chamher, a valve seat mounted in said, chamber having a central aperture therein connecting with said pouch chamber, said seat having a groove therein surrounding said aperture and having a thin edge between said groove and said aperture and also having a bleed hole connecting said groove with the suction, and a valve coiiperating with said seat having a flexible cover on the face next to said seat, said cover being attached to said valve along its outer edge only.

9. In a pneumatic instrument in combination, a valve, and a valve seat having a port'connected to a source of air tension, and provided with a groove in its face, said groove being separated from said port by a narrow ridge, said valve seat having a bleed hole normally connecting said groove with said source of tension, when said valve is seated.

10. In an automatic musical instrument in combination, a valve seat provided with groove and having ridges surrounding ice said groove and a valve coiiperating with my name this 12th day of October, A. 1)., said seat having a slightly loose flexible 1911. surface layer normally in contact with said ridges, said layer being adapted to 'droop HAIUQ ANDLRbOA' .5 away from said valve intermediate said WVitnesses:

ridges. A. LYDA J ONES,

In Witness whereof, I hereunto subscribe HAZEL J0me. 

